Finding the Third Proportional to 42,390 and 62,865

Step by Step Solution

1. Step 1: Write the proportion equation
   42,390 : 62,865 = 62,865 : x
2. Step 2: Convert to fraction form
   42,390/62,865 = 62,865/x
3. Step 3: Cross multiply
   42,390x = 62,865 × 62,865
4. Step 4: Simplify right side
   42,390x = 3,952,008,225
5. Step 5: Solve for x
   x = 3,952,008,225/42,390
6. Step 6: Final answer
   x = 93,229.73